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Showing results for tags 'boot'.
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Hello, I own a casioctk-691 that was working fine but suddenly stopped working.When I press power button the LCD goes ON but on screen shows something like I press a lot of keys/buttons at the same time,some letters are half.Also none of the keyboard buttons and keybed keys working.No sound at all.It looks like cannot boot or load the firmware to continue.Also I cannot turn it off from power button and I have to unplug the ac/dc power plug..The 9v adaptor is fine and also I used another bench adaptor with the same results.With batteries same result also. I disassembled the keyboard.The power supply board is fine.All dc voltage/capacitors/diodes according the service manual are ok.The cpu board gets all the 5v,9v,3.3v power..I found only that 1 of 2 Vram ics getting very hot quicly.If Vram is faulty IC can this be the reason for no booting or Not?..I tried the factory reset but because buttons not working nothing happens..I sent message to CASIO for a spare pcb but with no luck..It is my favorite keyboard and I will be very glad if someone with knoledge can help me or any ideas? Sorry for my long message, Thanks, Dimitris. 😊
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Hi everybody. I bought a new PX-830 back in 2011. Since then in some rare ocasions the piano has feezed and stoped responding but turnning off and on again fixed. I was never able to repoduce the problem but since it happens like 1 time per year I was not worried... until today: I was playing, I turned to see something on the computer, came back: piano was freezed. I turned off and on again but this time, only the red led turned on but the other lights that normaly does a sequence do not turn on. No matter what I do the piano seems dead but the turned on light is on. The boot sequence seems to no been excecuted so the piano does not do anything. Note: I have used the piano connected to the pc several times, but today wasn't doing anything but playing default piano sound, so it is not something related to midi since it is not connected to anything. Does this happend to someone else? Any suggesions? Thanks.